TreeDropTarget Class Reference

OLE drop target for tree controls. More...

#include <treedroptarget.h>

Inheritance diagram for TreeDropTarget:

Collaboration diagram for TreeDropTarget:

Public Member Functions
	TreeDropTarget (HWND hTargetWnd)
virtual bool	OnDrop (FORMATETC *pFmtEtc, STGMEDIUM &medium, DWORD *pdwEffect)
virtual HRESULT STDMETHODCALLTYPE	DragOver (DWORD grfKeyState, POINTL pt, DWORD __RPC_FAR *pdwEffect)
virtual HRESULT STDMETHODCALLTYPE	DragLeave (void)
Public Member Functions inherited from IDropTargetImpl
	IDropTargetImpl (HWND m_hTargetWnd)
virtual	~IDropTargetImpl ()
void	AddSuportedFormat (FORMATETC &ftetc)
virtual bool	OnDrop (FORMATETC *pFmtEtc, STGMEDIUM &medium, DWORD *pdwEffect)=0
virtual HRESULT STDMETHODCALLTYPE	QueryInterface (REFIID riid, void __RPC_FAR *__RPC_FAR *ppvObject)
virtual ULONG STDMETHODCALLTYPE	AddRef ()
virtual ULONG STDMETHODCALLTYPE	Release ()
bool	QueryDrop (DWORD grfKeyState, LPDWORD pdwEffect)
virtual HRESULT STDMETHODCALLTYPE	DragEnter (IDataObject __RPC_FAR *pDataObj, DWORD grfKeyState, POINTL pt, DWORD __RPC_FAR *pdwEffect)
virtual HRESULT STDMETHODCALLTYPE	DragOver (DWORD grfKeyState, POINTL pt, DWORD __RPC_FAR *pdwEffect)
virtual HRESULT STDMETHODCALLTYPE	DragLeave ()
virtual HRESULT STDMETHODCALLTYPE	Drop (IDataObject __RPC_FAR *pDataObj, DWORD grfKeyState, POINTL pt, DWORD __RPC_FAR *pdwEffect)
Public Member Functions inherited from IDropTarget
HRESULT	DragEnter ([in, unique] IDataObject *pDataObj, [in] DWORD grfKeyState, [in] POINTL pt, [in, out] DWORD *pdwEffect)
HRESULT	DragOver ([in] DWORD grfKeyState, [in] POINTL pt, [in, out] DWORD *pdwEffect)
HRESULT	DragLeave ()
HRESULT	Drop ([in, unique] IDataObject *pDataObj, [in] DWORD grfKeyState, [in] POINTL pt, [in, out] DWORD *pdwEffect)
Public Member Functions inherited from IUnknown
HRESULT	QueryInterface ([in] REFIID riid, [out, iid_is(riid)] void **ppvObject)
ULONG	AddRef ()
ULONG	Release ()

Additional Inherited Members
Public Types inherited from IDropTarget
typedef IDropTarget *	LPDROPTARGET
Public Types inherited from IUnknown
typedef IUnknown *	LPUNKNOWN
Public Attributes inherited from IDropTarget
const DWORD	MK_ALT = 0x20
const DWORD	DROPEFFECT_NONE = 0
const DWORD	DROPEFFECT_COPY = 1
const DWORD	DROPEFFECT_MOVE = 2
const DWORD	DROPEFFECT_LINK = 4
const DWORD	DROPEFFECT_SCROLL = 0x80000000
const DWORD	DD_DEFSCROLLINSET = 11
const DWORD	DD_DEFSCROLLDELAY = 50
const DWORD	DD_DEFSCROLLINTERVAL = 50
const DWORD	DD_DEFDRAGDELAY = 200
const DWORD	DD_DEFDRAGMINDIST = 2
Protected Attributes inherited from IDropTargetImpl
HWND	m_hTargetWnd

Detailed Description

OLE drop target for tree controls.

Definition at line 13 of file treedroptarget.h.

Constructor & Destructor Documentation

TreeDropTarget()

TreeDropTarget::TreeDropTarget ( HWND  hTargetWnd )

inline

Definition at line 16 of file treedroptarget.h.

: IDropTargetImpl(hTargetWnd) {}

Member Function Documentation

DragLeave()

virtual HRESULT STDMETHODCALLTYPE TreeDropTarget::DragLeave ( void  )

inlinevirtual

Reimplemented from IDropTargetImpl.

Definition at line 76 of file treedroptarget.h.

    {
        TreeView_SelectDropTarget(m_hTargetWnd, NULL);
 
        return IDropTargetImpl::DragLeave();
    }

DragOver()

virtual HRESULT STDMETHODCALLTYPE TreeDropTarget::DragOver ( DWORD  grfKeyState, POINTL  pt, DWORD __RPC_FAR *  pdwEffect  )

inlinevirtual

Reimplemented from IDropTargetImpl.

Definition at line 58 of file treedroptarget.h.

    {
        TVHITTESTINFO hit;
        hit.pt.x = pt.x;
        hit.pt.y = pt.y;
        ScreenToClient(m_hTargetWnd, &hit.pt);
        hit.flags = TVHT_ONITEM;
        HTREEITEM hItem = TreeView_HitTest(m_hTargetWnd,&hit);
 
        if (hItem != NULL)
            TreeView_SelectDropTarget(m_hTargetWnd, hItem);
 
        return IDropTargetImpl::DragOver(grfKeyState, pt, pdwEffect);
    }

OnDrop()

virtual bool TreeDropTarget::OnDrop ( FORMATETC *  pFmtEtc, STGMEDIUM &  medium, DWORD *  pdwEffect  )

inlinevirtual

Todo:

Add the code to handle Copy

Todo:

Add the code to handle Move

Implements IDropTargetImpl.

Definition at line 18 of file treedroptarget.h.

    {
        if (pFmtEtc->cfFormat == CF_HDROP && medium.tymed == TYMED_HGLOBAL)
        {
            HDROP hDrop = (HDROP)GlobalLock(medium.hGlobal);
            if (hDrop != NULL)
            {
                TCHAR szFileName[MAX_PATH];
 
                UINT cFiles = DragQueryFile(hDrop, 0xFFFFFFFF, NULL, 0);
 
                for(UINT i = 0; i < cFiles; ++i)
                {
                    DragQueryFile(hDrop, i, szFileName, sizeof(szFileName));
 
                    if (DROPEFFECT_COPY & *pdwEffect)
                    {
                         // copy the file or dir
 
 
                    }
                    else if (DROPEFFECT_MOVE & *pdwEffect)
                    {
                         // move the file or dir
 
 
                    }
                }
                //DragFinish(hDrop); // base class calls ReleaseStgMedium
            }
            GlobalUnlock(medium.hGlobal);
        }
 
        TreeView_SelectDropTarget(m_hTargetWnd, NULL);
 
        return true; //let base free the medium
    }

---

The documentation for this class was generated from the following file:

• modules/rosapps/applications/explorer-old/utility/treedroptarget.h